Lawn-mower sharpener.



K. E. STAHL. LAWN MOWER SHARPBNER.

APPLICATION FILED MAY 21, 1913.

Patented Feb. 23, 1915.

2 SHEETSSHEET 1.

51 1 vcmtoz K. E. Stall Z K. E. STAHL.

LAWN MOWER SHARPENER.

APPLICATION FILED MAY 21, 1913. LIQQJI 331, Patented Feb. 23, 1915.

8440a who c f 7 Aff. Jmm

m w I Witmeooeo I KARL n STAHL, or cnnynmm'; WYOMING, assienoa or rrrrz nn one-THIRD one nnnnannrns To FRANK J. son, or cnnrnnnn, WYOMING.

Lawn-MOW R snaarnnna.

Application filed May 21, 1913. Serial No. 769,079.

T all whom it ma; concern:

Be it known that I, KARL E. STAHL, 21 citizen of Sweden, residing at Cheyenne, in the county of Laramie and State of Wyo ming, have invented certain new and useful Improvements in Lawn-Mower Sharpeners, of which the following is a specification.

This invention relates to lawn mower sharpeners and more particularly to improvements in that type of Sharpeners D1 which .emery paper or the like is utilized.

The object of my invention is to provide a simple, inexpensive, and highly efficient device of the character described by means of which the renewal of wornout emery vpaper may be rendered easy, and by means ence characters designate similar parts throughout the respective views, Figure 1 is a bottom plan view of my invention, Flg. 2

' is a top View thereof, Fig. 3 is a detail perspective view of my invention, Fig, 4 is an elevation of a lawn mower,show1ng the correct position of my invention relatively thereto, my invention being shown partly broken away, Fig. 5 is a "cross sectional view of the blades of a mower shown relatively to my blade sharpener, and Fig.-6

is a view of a modification of my invent1on.-

-Reference being made to the accompanying drawings which are merely illustrative of my invention, there is illustrated .a sharpener for lawn mowers and the like which may be made in various designs.

The leading feature of'my invention consists in providing a sharpener arcuate in shape, which will be yieldable under the action of the mower blades, and which can be applied against the blades of the lawn mower with facility; x

1 designates a U shaped member made preferably of suitable resilient or spring metal. In the example shown in Figs. 1-5

the sharpener is shown to flare outwardly,-

but this is not necessary as is shown in the modification illustrated in Fig. 6, where it Specification of Letters Patent.-

Patented Feb. 23, 1915..

will be noticed that the sharpener takes the outline substantially that of a segment of a circle. Formed upon the free ends of member *1 are the return marginal portions '2 and 3 forming guides or tracks for the reception of the terminals 4 and 5 of a flexible sheet 6 having a grinding surface terialwell known to those skilled in the art. It is evident that the grinding sheets may be U shaped in contour before being inserted into the return portions 2 and 3. It will be noticed that the emery sheet 6 is adapted to be applied to member 1 while fiat, being of a sufficient sizeso as to contact the eflective bearing surface of member 1, said sheet conforming to the contour of 'made of emery, or of any other suitable masaid member by virtue of its own resiliency and being held against displacement by the' return portions 2 and3 hereinbeforementioned, It will be readily seen that an emery shectmay be easily slid,into or out of the guides formed bysaid return portions as indicated in dotted lines in Fig. 2. The handle 7 'is secured to the top of member 1 by virtue of which it may be easily manipulated. In Fig. 6 I show member 1 having substantially parallel terminal portions 8 and .9 u'pon which the return portions areformed.

In practice the sharpener will be'applied ner illustrated in Figs. 5 and 6. The user turn-porti0ns;'w1ll be in vertical alinement. Then by causing blades 10 of the/mower to to the blade of the lawn mower in the mansuccessively rub a ainst the emery surface of shee't 6, while t e mower is turned in a direction opposite to that required to efi'ect a cutting'action, said blades will be sharpened, eachblade moving practically across the entire grindingsurface of member 1, an advantage over prior devices which isvery marked. li i From the above it will be seen that I have provided a'sharpener for lawn mowers which is extremely simple in construction, attractive in design and well adapted to yield sli htly, if necessary, against the rubbing action of the blades so that the desired uniform keennessof the blades may beat tained. v

While I have described the details of construction of my invention I do not mean to limit myself thereto but claim all variaan arcuate resilient sheet metal member tions and modifications within the purview having inwardly turned flanges at the reof the appended claims. spective ends of the arch and adapted to What I desire to claim and secure by Letreleasably embrace opposite ends of a flexi- 5 ters Patent is: ble abrading sheet, and a handle secured 1. A lawn mower sharpener comprising to the outer side of said member and disan arcuate -res1l1ent member having oppoposed transversely to said flanges.

.a flexible abrading member located within signature in presence of two witnesses. 10 said arcnate member and having opposite KARL E. STAHL.

edge releasably held respectively by said Witnesses: flanges. A. D. JOHNSTON,

2. A lawn mower sharpener comprising CHARLES E. LANE.

sitely disposed inwardly turned flanges, and In testimony whereof I have afiixed my' 

